Gettime project going wrong

Punit Salian

Other Parts Discussed in Thread: CC3200

Hey guys I just got hold of the CC3200 I started with the get time example program everything works just fine except that the time displayed is wrong I have attached the screenshot of the output can anybody help

over 9 years ago

0 Joseph Gigi over 9 years ago

TI__Guru* 85400 points

Hi,

Have you modified: GMT_DIFF_TIME_HRS & GMT_DIFF_TIME_MINS ?
Please see: processors.wiki.ti.com/.../CC32xx_Info_Center_Get_Time_Application

Regards,
Gigi Joseph.

0 Punit Salian over 9 years ago in reply to Joseph Gigi

Prodigy 210 points

Yes I added the Gmt time difference now the time is right but the date is a day ahead like it should 14 but its giving 15 is this due to 2016 being leap year?

0 Punit Salian over 9 years ago

Prodigy 210 points

Guys anybody can just give some idea like whats wrong

0 Austin Tanner over 9 years ago in reply to Punit Salian

TI__Expert 8255 points

Hi Punit,

Please refer to the GetSNTPTime function in main for the algorithm which converts the NTP (Network Time Protocol) packet from seconds since 1900 to a human readable date. A conversion error of this timestamp is likely causing the value to be a day off.

Best,

Austin

0 kaiser bhatti over 9 years ago in reply to Punit Salian

Prodigy 70 points

Here is a fix this should give you right date and time base on your time zone.

long GetSNTPTime(/*unsigned char*/ long ucGmtDiffHr, /*unsigned char*/ long ucGmtDiffMins)
{

/*
NTP Packet Header:

0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|LI | VN |Mode | Stratum | Poll | Precision |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Root Delay |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Root Dispersion |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reference Identifier |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Reference Timestamp (64) |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Originate Timestamp (64) |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Receive Timestamp (64) |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Transmit Timestamp (64) |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Key Identifier (optional) (32) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| |
| Message Digest (optional) (128) |
| |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

*/
char cDataBuf[48];
long lRetVal = 0;
int iAddrSize;
//
// Send a query ? to the NTP server to get the NTP time
//
memset(cDataBuf, 0, sizeof(cDataBuf));
cDataBuf[0] = '\x1b';

sAddr.sa_family = AF_INET;
// the source port
sAddr.sa_data[0] = 0x00;
sAddr.sa_data[1] = 0x7B; // UDP port number for NTP is 123
sAddr.sa_data[2] = (char)((g_sAppData.ulDestinationIP>>24)&0xff);
sAddr.sa_data[3] = (char)((g_sAppData.ulDestinationIP>>16)&0xff);
sAddr.sa_data[4] = (char)((g_sAppData.ulDestinationIP>>8)&0xff);
sAddr.sa_data[5] = (char)(g_sAppData.ulDestinationIP&0xff);

lRetVal = sl_SendTo(g_sAppData.iSockID,
cDataBuf,
sizeof(cDataBuf), 0,
&sAddr, sizeof(sAddr));
if (lRetVal != sizeof(cDataBuf))
{
// could not send SNTP request
ASSERT_ON_ERROR(SERVER_GET_TIME_FAILED);
}

//
// Wait to receive the NTP time from the server
//
sLocalAddr.sin_family = SL_AF_INET;
sLocalAddr.sin_port = 0;
sLocalAddr.sin_addr.s_addr = 0;
if(g_sAppData.ulElapsedSec == 0)
{
lRetVal = sl_Bind(g_sAppData.iSockID,
(SlSockAddr_t *)&sLocalAddr,
sizeof(SlSockAddrIn_t));
}

iAddrSize = sizeof(SlSockAddrIn_t);

lRetVal = sl_RecvFrom(g_sAppData.iSockID,
cDataBuf, sizeof(cDataBuf), 0,
(SlSockAddr_t *)&sLocalAddr,
(SlSocklen_t*)&iAddrSize);
ASSERT_ON_ERROR(lRetVal);

//
// Confirm that the MODE is 4 --> server
//
if ((cDataBuf[0] & 0x7) != 4) // expect only server response
{
ASSERT_ON_ERROR(SERVER_GET_TIME_FAILED); // MODE is not server, abort
}
else
{
unsigned char iIndex;

//
// Getting the data from the Transmit Timestamp (seconds) field
// This is the time at which the reply departed the
// server for the client
//
g_sAppData.ulElapsedSec = cDataBuf[40];
g_sAppData.ulElapsedSec <<= 8;
g_sAppData.ulElapsedSec += cDataBuf[41];
g_sAppData.ulElapsedSec <<= 8;
g_sAppData.ulElapsedSec += cDataBuf[42];
g_sAppData.ulElapsedSec <<= 8;
g_sAppData.ulElapsedSec += cDataBuf[43];

//
// seconds are relative to 0h on 1 January 1900
//
g_sAppData.ulElapsedSec -= TIME2013;

//
// in order to correct the timezone
//
g_sAppData.ulElapsedSec += (ucGmtDiffHr * SEC_IN_HOUR);
g_sAppData.ulElapsedSec += (ucGmtDiffMins * SEC_IN_MIN);

g_sAppData.pcCCPtr = &g_sAppData.acTimeStore[0];

//
// day, number of days since beginning of 2013
//
g_sAppData.isGeneralVar = g_sAppData.ulElapsedSec/SEC_IN_DAY;
memcpy(g_sAppData.pcCCPtr,
g_acDaysOfWeek2013[g_sAppData.isGeneralVar%7], 3);
g_sAppData.pcCCPtr += 3;
*g_sAppData.pcCCPtr++ = '\x20';

//
// month
//
g_sAppData.isGeneralVar %= 365;
for (iIndex = 0; iIndex < 12; iIndex++)
{
g_sAppData.isGeneralVar -= g_acNumOfDaysPerMonth[iIndex];
if (g_sAppData.isGeneralVar <= 0)
break;
}
if(iIndex == 12)
{
iIndex = 0;
}
memcpy(g_sAppData.pcCCPtr, g_acMonthOfYear[iIndex], 3);
g_sAppData.pcCCPtr += 3;
*g_sAppData.pcCCPtr++ = '\x20';

//
// date
// restore the day in current month
//
g_sAppData.isGeneralVar += g_acNumOfDaysPerMonth[iIndex];
g_sAppData.uisCCLen = itoa(g_sAppData.isGeneralVar , g_sAppData.pcCCPtr);
g_sAppData.pcCCPtr += g_sAppData.uisCCLen;
*g_sAppData.pcCCPtr++ = '\x20';

//
// time
//
g_sAppData.ulGeneralVar = g_sAppData.ulElapsedSec%SEC_IN_DAY;

// number of seconds per hour
g_sAppData.ulGeneralVar1 = g_sAppData.ulGeneralVar%SEC_IN_HOUR;

// number of hours
g_sAppData.ulGeneralVar /= SEC_IN_HOUR;
g_sAppData.uisCCLen = itoa(g_sAppData.ulGeneralVar,
g_sAppData.pcCCPtr);
g_sAppData.pcCCPtr += g_sAppData.uisCCLen;
*g_sAppData.pcCCPtr++ = ':';

// number of minutes per hour
g_sAppData.ulGeneralVar = g_sAppData.ulGeneralVar1/SEC_IN_MIN;

// number of seconds per minute
g_sAppData.ulGeneralVar1 %= SEC_IN_MIN;
g_sAppData.uisCCLen = itoa(g_sAppData.ulGeneralVar,
g_sAppData.pcCCPtr);
g_sAppData.pcCCPtr += g_sAppData.uisCCLen;
*g_sAppData.pcCCPtr++ = ':';
g_sAppData.uisCCLen = itoa(g_sAppData.ulGeneralVar1,
g_sAppData.pcCCPtr);
g_sAppData.pcCCPtr += g_sAppData.uisCCLen;
*g_sAppData.pcCCPtr++ = '\x20';

//
// year
// number of days since beginning of 2013
//
g_sAppData.ulGeneralVar = g_sAppData.ulElapsedSec/SEC_IN_DAY;
g_sAppData.ulGeneralVar /= 365;
g_sAppData.uisCCLen = itoa(YEAR2013 + g_sAppData.ulGeneralVar,
g_sAppData.pcCCPtr);
g_sAppData.pcCCPtr += g_sAppData.uisCCLen;

*g_sAppData.pcCCPtr++ = '\0';

UART_PRINT("response from server: ");
UART_PRINT((char *)g_acSNTPserver);
UART_PRINT("\n\r");
UART_PRINT(g_sAppData.acTimeStore);
UART_PRINT("\n\r\n\r");
}
return SUCCESS;
}

0 kaiser bhatti over 9 years ago in reply to kaiser bhatti

Prodigy 70 points

Did this work for you let me know if you still have an issue.

0 Prasanth R over 9 years ago in reply to kaiser bhatti

Intellectual 370 points

by removing 1 from the date calculation will print you the start of month as 0, so, Instead of changing the calculation change the array that has number of days to 29 in 1st index behalf of 28.

const char g_acNumOfDaysPerMonth[12] = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

but this is also not a full solution, because,this will work fine for leap year not for ordinary year.
If you got any solution for that please share...

0 Punit Salian over 9 years ago in reply to Prasanth R

Prodigy 210 points

Yes I have refined the whole code to get it working disappointing that TI has shipped wrong example code

0 Prasanth R over 9 years ago in reply to Punit Salian

Intellectual 370 points

I too refined now only, Here is the change that i have done.

const char g_acNumOfDaysPerMonthNonLeapYear[12] = {31, 28, 31, 30, 31, 30,
31, 31, 30, 31, 30, 31};

long GetSNTPTime(unsigned char ucGmtDiffHr, unsigned char ucGmtDiffMins)
{

/*
NTP Packet Header:

0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|LI | VN |Mode | Stratum | Poll | Precision |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Root Delay |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Root Dispersion |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reference Identifier |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Reference Timestamp (64) |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Originate Timestamp (64) |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Receive Timestamp (64) |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Transmit Timestamp (64) |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Key Identifier (optional) (32) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| |
| Message Digest (optional) (128) |
| |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

*/
char cDataBuf[48];
long lRetVal = 0;
int iAddrSize;
//
// Send a query ? to the NTP server to get the NTP time
//
memset(cDataBuf, 0, sizeof(cDataBuf));
cDataBuf[0] = '\x1b';

sAddr.sa_family = AF_INET;
// the source port
sAddr.sa_data[0] = 0x00;
sAddr.sa_data[1] = 0x7B; // UDP port number for NTP is 123
sAddr.sa_data[2] = (char)((g_sAppData.ulDestinationIP>>24)&0xff);
sAddr.sa_data[3] = (char)((g_sAppData.ulDestinationIP>>16)&0xff);
sAddr.sa_data[4] = (char)((g_sAppData.ulDestinationIP>>8)&0xff);
sAddr.sa_data[5] = (char)(g_sAppData.ulDestinationIP&0xff);

lRetVal = sl_SendTo(g_sAppData.iSockID,
cDataBuf,
sizeof(cDataBuf), 0,
&sAddr, sizeof(sAddr));
if (lRetVal != sizeof(cDataBuf))
{
// could not send SNTP request
ASSERT_ON_ERROR(SERVER_GET_TIME_FAILED);
}

//
// Wait to receive the NTP time from the server
//
sLocalAddr.sin_family = SL_AF_INET;
sLocalAddr.sin_port = 0;
sLocalAddr.sin_addr.s_addr = 0;
if(g_sAppData.ulElapsedSec == 0)
{
lRetVal = sl_Bind(g_sAppData.iSockID,
(SlSockAddr_t *)&sLocalAddr,
sizeof(SlSockAddrIn_t));
}

iAddrSize = sizeof(SlSockAddrIn_t);

lRetVal = sl_RecvFrom(g_sAppData.iSockID,
cDataBuf, sizeof(cDataBuf), 0,
(SlSockAddr_t *)&sLocalAddr,
(SlSocklen_t*)&iAddrSize);
ASSERT_ON_ERROR(lRetVal);

//
// Confirm that the MODE is 4 --> server
//
if ((cDataBuf[0] & 0x7) != 4) // expect only server response
{
ASSERT_ON_ERROR(SERVER_GET_TIME_FAILED); // MODE is not server, abort
}
else
{
unsigned char iIndex;

//
// Getting the data from the Transmit Timestamp (seconds) field
// This is the time at which the reply departed the
// server for the client
//
g_sAppData.ulElapsedSec = cDataBuf[40];
g_sAppData.ulElapsedSec <<= 8;
g_sAppData.ulElapsedSec += cDataBuf[41];
g_sAppData.ulElapsedSec <<= 8;
g_sAppData.ulElapsedSec += cDataBuf[42];
g_sAppData.ulElapsedSec <<= 8;
g_sAppData.ulElapsedSec += cDataBuf[43];

//
// seconds are relative to 0h on 1 January 1900
//
g_sAppData.ulElapsedSec -= TIME2013;

//
// in order to correct the timezone
//
g_sAppData.ulElapsedSec += (ucGmtDiffHr * SEC_IN_HOUR);
g_sAppData.ulElapsedSec += (ucGmtDiffMins * SEC_IN_MIN);

g_sAppData.pcCCPtr = &g_sAppData.acTimeStore[0];

//
// day, number of days since beginning of 2013
//
g_sAppData.isGeneralVar = g_sAppData.ulElapsedSec/SEC_IN_DAY;
memcpy(g_sAppData.pcCCPtr,
g_acDaysOfWeek2013[g_sAppData.isGeneralVar%7], 3);
g_sAppData.pcCCPtr += 3;
*g_sAppData.pcCCPtr++ = '\x20';

//
// year
// number of days since beginning of 2013
//
g_sAppData.ulGeneralVar = g_sAppData.ulElapsedSec/SEC_IN_DAY;
g_sAppData.ulGeneralVar /= 365;
g_sAppData.uisCCLen = itoa(YEAR2013 + g_sAppData.ulGeneralVar,
g_sAppData.pcCCPtr);
g_sAppData.pcCCPtr += g_sAppData.uisCCLen;

int Year = 0;
Year = (YEAR2013 + g_sAppData.ulGeneralVar);
*g_sAppData.pcCCPtr++ = '\x20';

if(((Year % 4 == 0) && (Year % 100 != 0))||(Year % 400 == 0))
{
//
// month
//
g_sAppData.isGeneralVar %= 365;
for (iIndex = 0; iIndex < 12; iIndex++)
{
g_sAppData.isGeneralVar -= g_acNumOfDaysPerMonth[iIndex];
if (g_sAppData.isGeneralVar < 0)
break;
}
if(iIndex == 12)
{
iIndex = 0;
}
memcpy(g_sAppData.pcCCPtr, g_acMonthOfYear[iIndex], 3);
g_sAppData.pcCCPtr += 3;
*g_sAppData.pcCCPtr++ = '\x20';

//
// date
// restore the day in current month
//

g_sAppData.isGeneralVar += g_acNumOfDaysPerMonth[iIndex];
g_sAppData.uisCCLen = itoa(g_sAppData.isGeneralVar + 1,
g_sAppData.pcCCPtr);
g_sAppData.pcCCPtr += g_sAppData.uisCCLen;
*g_sAppData.pcCCPtr++ = '\x20';
}
else
{
//
// month
//
g_sAppData.isGeneralVar %= 365;
for (iIndex = 0; iIndex < 12; iIndex++)
{
g_sAppData.isGeneralVar -= g_acNumOfDaysPerMonthNonLeapYear[iIndex];
if (g_sAppData.isGeneralVar < 0)
break;
}
if(iIndex == 12)
{
iIndex = 0;
}
memcpy(g_sAppData.pcCCPtr, g_acMonthOfYear[iIndex], 3);
g_sAppData.pcCCPtr += 3;
*g_sAppData.pcCCPtr++ = '\x20';

//
// date
// restore the day in current month
//

g_sAppData.isGeneralVar += g_acNumOfDaysPerMonthNonLeapYear[iIndex];
g_sAppData.uisCCLen = itoa(g_sAppData.isGeneralVar + 1,
g_sAppData.pcCCPtr);
g_sAppData.pcCCPtr += g_sAppData.uisCCLen;
*g_sAppData.pcCCPtr++ = '\x20';

}

//
// time
//
g_sAppData.ulGeneralVar = g_sAppData.ulElapsedSec%SEC_IN_DAY;

// number of seconds per hour
g_sAppData.ulGeneralVar1 = g_sAppData.ulGeneralVar%SEC_IN_HOUR;

// number of hours
g_sAppData.ulGeneralVar /= SEC_IN_HOUR;
g_sAppData.uisCCLen = itoa(g_sAppData.ulGeneralVar,
g_sAppData.pcCCPtr);
g_sAppData.pcCCPtr += g_sAppData.uisCCLen;
*g_sAppData.pcCCPtr++ = ':';

// number of minutes per hour
g_sAppData.ulGeneralVar = g_sAppData.ulGeneralVar1/SEC_IN_MIN;

// number of seconds per minute
g_sAppData.ulGeneralVar1 %= SEC_IN_MIN;
g_sAppData.uisCCLen = itoa(g_sAppData.ulGeneralVar,
g_sAppData.pcCCPtr);
g_sAppData.pcCCPtr += g_sAppData.uisCCLen;
*g_sAppData.pcCCPtr++ = ':';
g_sAppData.uisCCLen = itoa(g_sAppData.ulGeneralVar1,
g_sAppData.pcCCPtr);
g_sAppData.pcCCPtr += g_sAppData.uisCCLen;
*g_sAppData.pcCCPtr++ = '\0';

UART_PRINT("response from server: ");
UART_PRINT((char *)g_acSNTPserver);
UART_PRINT("\n\r");
UART_PRINT(g_sAppData.acTimeStore);
UART_PRINT("\n\r\n\r");
}
return SUCCESS;
}

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